短路还原法提取铁的研究

STUDY ON EXTRACTION OF IRON BY THE SHORT CIRCUIT REDUCTION METHOD

采用氧离子导体氧化锆管与还原剂碳、含有电活性物质 FeO 的熔渣组成电化学体系,利用原电池短路方法从氧化物熔渣中电化学还原得到了无碳金属．实验电池组成为：石墨,[O]_(Fe-C(saturated))|ZrO_2(MgO)|Cu_((1))+(FeO)_((slag)),钼丝．利用电化学分析仪,通过测定外电路电流研究了渣中 FeO 含量、温度以及外电路电阻对熔渣中 FeO 电化学还原的影响．结果表明：在实验条件下,温度越高,渣中 FeO 含量越高,外电路电阻越小,熔渣电化学还原就越快．实际终还原率达95%以上．提出了可控氧流冶金中的一种还原方法,发展了可控氧流冶金理论．

The zirconia, carbon and molten slags containing FeO were used to constitute a galvanic cell. The carbon-free metal could be directly obtained from molten oxide slags by the short circuit galvanic cell method. The following galvanic cell was assembled in the present experiment： graphite rod, [O]Fe-C（saturated）｜ZrO2 （MgO）｜Cu（1） ＋ （FeO）（slag）, Mo wire. Through measuring short circuit current by means of the electrochemical instrument, the electro-reduction reaction was studied by controlling factors such as temperature, the content of FeO, the external circuit resistance. The results showed that under the experimental conditions the reduction rate got larger with the elevation of temperature, the increase of FeO content and the decrease of the external circuit resistance. The actual final reduction ratio reached over 95%. A reduction method in the metallurgy with controlled oxygen flow was setup and the theory for metallurgy with controlled oxygen flow was developed.